I will repeat this as I have had to say it before:

There is no engineering fix to AF447. You cannot protect a plane from what is essentially a rogue pilot who is not restrained.

It would have happened exactly the same in a Boeing. The problem was a supposedly trained and tested pilot responding to a somewhat normal event (loss of awareness and disorientation) by freaking the fuck out and throwing a plane into the ocean from 30k feet. The copilot knew what was going on with 3 minutes left until impact, and was trying to fix things, and was using the feature to override dual input, and was still being hampered by a pilot who was refusing to do the only safe thing he should have: Sit back and shut the fuck up.

The actual solution is regular testing of pilots in stressful simulations to ensure they react predictably in bad situations. That can never be perfect though.